Description
Characteristics:
LKE-12018-G is a low hydrogen electrode for the welding of 830 N/mm² grade high tensile steel. With excellent crack resistance, good mechanical property and bead appearance. It is provided with good arc and easy slag removal.
Applications:
It is suitable for welding of heat treatable low alloy steel such as SCM21/4 Cr-Mo steel,SNCM8 Ni-Cr-Mo steel. Proper base metals are also including forging cast iron(ASTM A486 Gr.120/A508 Gr.5a.4a),pressure vessel steel plate (A543 Gr.B3C3),ect.
Notes on Usage:
1.Dry the electrodes at 350-400°C for 60 minutes and keep at 100-150°C before use.
2.Preheat the plates at 150-200°C is before welding.
3.Keep the arc as short as possible.
4.Take the back-step method at the arc starting to prevent blowholes.
Classification:
AWS A5.5 E12018-G
EN EN757 E 79 5 Mn2NiMo B 3 2
Welding position:
Typical chemical composition of weld metal (wt%)
| C | Mn | Si | P | S | Ni | Mo | Cr | V |
| 0.06 | 1.40 | 0.40 | 0.025 | 0.003 | 2.0 | 0.4 | 0.7 | 0.008 |
Typical mechanical properties of weld metal
| YP N/mm² | TS N/mm² | EL % | IV -50℃ J |
| 840 | 920 | 22 | 50 |
Sizes and recommended current range (AC or DC+)
| Diameter (mm) | 3.2 | 4.0 | 5.0 | |
| Length (mm) | 350 | 450 | 450 | |
| Amps | F | 120-150 | 160-200 | 180-240 |
| V&OH | 105-125 | 130-150 | – | |
| Weight per pack (kg) | 5 | 5 | 5 | |
| Weight per carton (kg) | 20 | 20 | 20 | |
